Systematic error of digital measurement system (DSM) mainly exists in the analog measurement channels. The cause of systematic errors is circuit status and parameters of OPA, DAC and reference circuit which drift with changes in temperature and time deviate from the standard values. In this paper, firstly...

This study have explored a method to obtain the airflow characteristics and the particle trajectories using CFD techniques and SST k- around a UAV. Numerical simulations of gas-phase turbulence physics at the flight speed of 20 and 40m/s and the altitude of 600 m have been carried out. DPM model simulated...

In recent years, with the rapid development of electrified railway, caused the number of AC-DC electric locomotive has a rapid growth. For power systems, electric locomotives as the non-linear loads, the harmonic problems caused by the electric locomotives have been increasingly important and get the...

Compared with the two level voltage source,the modular multilevel converter (MMC) adopting the modular design dose not have the disadvantages such as the direct series connected Insulated gate bipolar (IGBT),high generation of harmonics,etc.MMC is currently studied and applied in high voltage and high...

In this paper, we use the panel data over the period of 2002 - 2012 from 29 provinces in China to test the impacts of real estate value on the GDP. The result shows that the real estate value has a positive effect on GDP, but the output value has a biphasic effect on GDP and there are strong regional...

The land is the foundation of social and economic development of the city, and the effective supply of construction land is an important guarantee for the economic development of the city. The use of land resources of Jinan metropolitan in the structure is unreasonable, and the occupation of cultivated...

Seven representative empirical potential evapotranspiration equations selected form the radiation-based and temperature-based methods, they were evaluated and compared with the Penman-Montieth equation using daily meteorological data form Mizhi station in north of Shanxi. The comparison was first made...

"HMI" means the area of mutual influence between the human-machine , who participate in all areas of human-computer exchange of information are part of the man-machine interface. The design is the study of human art, not a simple machine and equipment subject, object by object relations representative,...

Hybrid sleeve bearings are normally lubricated with high viscosity lubricant, the temperature of oil film increases with the increase of rotating speed. The low viscosity lubricant can decrease the temperature, which is the efficient method to increase the rotating speed of hybrid sleeve bearings. A...

A multi-protocol converter was developed by embedded system, which used a method of protocol analysis based on character set to establish both a sequence of command instructions and a sequence of protocol analysis methods for one serial port, used an analysis method of character set to collect and extract...

Mobile devices have been widely used to assist the existing public transportation system. A new solution to the vehicle information collection is introduced. The hardware design of a vehicle information communication platform is mainly introduces, including platform power distribution design, the battery...

The control system of a certain type APU is analyzed and researched. Certain analysis on the mechanism of the structure and working principle of APU and study of the idea of its fuel control system are made. The main fuel flow control law and control algorithm are deduced by reverse analysis method....

Multi-channel high-power electrical prospecting instrument (MTEM) transmitter is developed on the basis of the bipolar switching power’s principle.Thedesign ofthe transformer’smain components is critical to the performance of MTEM transmitter system.The dual-input dual-output 60KW of power transformers...

In this paper, we put forward a new type of intelligent assistant management system, and implement the hardware design of intelligent assistant system for pedestrian traffic in city. Thissystem uses MCU as main control chip, also includesanother four parts: mechanical arm, detector, image acquisition...

Take MCS-51 series as an example, introduced a high-speed control scheme of single- chip solutions for large LED screen display.The control of SCM for LED display screen generally start read data from data memory then write the data to LED dot matrix tablets. The innovation of this program are that use...

The paper focuses on research the solution of establishing the model of packet transmitted network and implement of it, withing the powerful simulation of network modeling of OPNET. To see the effect of the packet generation rate on the performance of the network, using the Simulation Editor to create...

As the state promote the triple play actively, many companies and research institutes have conducted in-depth research and development of the multi- screen interactive products. In this paper, the author designed a new multi-screen interactive product, that started from multi-screen interactive background...

At present, mainstream traffic information acquisition methods cannot directly get the vehicle speed and traffic density, but VANET-based  broadcast mode can be very good to meet this requirement. This paper studies the traffic information  distribution to collect traffic information based on VANET....

With the deepening of reform and opening up and the development of foreign exchanges, English education is becoming more and more important, the comprehensive information management of English examination is an important way to enhance the information level of English education. This paper is based on...

With the rising of Chinese labor costs, industrial robots as a new type of labor force, is quietly changing employment pattern of China's manufacturing industry. This article first introduced the current development of industrial robots at home and abroad, summed up the current situation of China's industrial...